Power test of the separated function RFQ accelerator

The progress of the Separated Function RFQ (SFRFQ) accelerator, which can raise the field gradient of acceleration while maintaining the transverse focusing power sufficient for high current beam, is presented. In order to demonstrate the feasibilities of the novel accelerator, a prototype cavity was designed and constructed. Correspondingly, a code SFRFQCODEV1.0 was developed specially for cavity design and beam dynamics simulation. The prototype cavity will be verified as a post-accelerator for ISR RFQ-1000 (Integral Split Ring RFQ) and accelerate O+ from 1 MeV to 1.6 MeV. To inject a higher current oxygen beam for the prototype cavity, the beam current of ISR RFQ-1000 was upgraded to 2 mA. The status of high power and beam test preparation for the prototype cavity are presented in this paper.     

Studies on RFQ accelerators and its applications

Development activities of Radio Frequency Quadrupole （RFQ） accelerators in China are presented. A 1 MeV O＋ RFQ and a 3.5 MeV ADS proton RFQ have been constructed. A novel separated function RFQ is under beam test, a 2 MeV D＋ RFQ is under construction and a CSNS RFQ is going to be constructed. The RFQ dynamics and the simultaneous dual beam acceleration with positive and negative ions were investigated and related codes were developed. The applications of RFQ will be further promoted in China.     

Power test of the separated function RFQ accelerator

The progress of the Separated Function RFQ (SFRFQ) accelerator, which can raise the field gradient of acceleration while maintaining the transverse focusing power sufficient for high current beam, is presented. In order to demonstrate the feasibilities of the novel accelerator, a prototype cavity was designed and constructed. Correspondingly, a code SFRFQCODEV1.0 was developed specially for cavity design and beam dynamics simulation. The prototype cavity will be verified as a post-accelerator for ISR RFQ-1000 (Integral Split Ring RFQ) and     

国际会议消息

1986年6月16日至20日──第四届国际统计决策理论及有关题目讨论会,于美国印地安　　　　那州,西拉发叶特.通讯处及联系人:美国印地安那州47907,西拉发叶特,普陀　　　　大学,统计系,山蒂S.格伯特.　　　　(Shanti　S.GuPta,DePt.of　Statistic,Purdue　Univ.,West　Lafayette,     

有功于日本全面质量管理体系的鲜为人知的美国杰出人士── 霍默M·萨拉索恩采访记

自从戴明奖,即一种为管理而设的,被羡慕为管理方面的“奥斯卡”奖,1951年发端于日本以来,日本各公司都一直在奋力追求产品质量的不断改进,以致在日本“零缺陷”和全面质量管理传奇般地出现.然而,真正对战后日本全面质量管理运动的兴起立下功劳的是三位美国工程师,萨拉索恩(Sarasohn)是这三人之一,他是日本战后转变为全面质量管理体系的背后倡议人,甚至后来1951年邀请戴明到日本,使初生的质量控制运动得以持续下去,也是他促成的. 美国太平洋盆地季刊去年夏天采访了萨拉索恩.下面是他们之间的对话摘要. 您是怎样去日本的? 1945年秋,麦克阿瑟…     

分离作用RFQ加速系统研究进展

介绍了SFRFQ加速系统的最新研究进展.为验证SFRFQ结构的抗打火性能,设计了一个高功率模型腔,进行了高功率打火实验,并最终证明了该结构的可行性.为验证SFRFQ加速器的载束性能,设计了一台长度仅为lm的600keV O+SFRFQ加速器,它将把从1MeV ISR RFQ引出的O+离子加速到1.6MeV.为解决1MeV ISR RFQ引出柬流与SFRFQ加速器的横向匹配问题,在其间插入了一个三单元磁四极透镜.SFRFQ加速器加工和1MeV ISR RFQ改造的进展顺利.     

重离子整体分离RFQ加速器的升级改造

介绍了北京大学重离子整体分离环RFQ(ISR RFQ)加速器的升级改造工作,包括升级后RFQ加速系统的组成;强流永磁2.45GHz O+ECR离子源的台面测试结果;真空系统的改造;1MeV ISR RFQ加速器的高频控制系统改造;以及强流束流加速实验的结果.     

RFQ加速器同时加速同荷质比正负离子的实验研究

阐述了利用北京大学26MHz 300keV整体分离环高频四极场(ISR RFQ)加速器同时加速同荷质比正负离子的研究结果.分别用O⁺和O^－离子的连续束以及脉冲束同时注入,均实现了RFQ加速器对同荷质比正负离子的同时加速.用快靶测得的经RFQ腔同时加速后形成的O⁺及O^－离子微脉冲束与预想的正负氧离子微脉冲束相位关系完全一致.证实了同时加速时得到的氧离子束总和明显高于单加速一种离子时得到的氧离子束.在国际上首次实现了用RFQ加速器同时加速同荷质比的正负离子.